![]() If the batteries are put through an equalization phase every month or two this helps battery health. However they are quite robust and will survive ill treatment short term. The usual issues with these batteries is under charging due to low charge voltage and not enough absotbtion time. Trojan T105 batteries powered the electrical systems of my sailboat for over 50k miles and until recent years, when Lithium became affordable, were widely used in ocean voyaging sailboats. Set up a maintenance program to check battery SG and electrolyte level. Ensure no naked flames or fuses that are not ignition protected near the batteries. These batteries will gas under charge so need ventilation to prevent a build up of oxygen and hydrogen. At normal temperatures expect a charge voltage of 14.8 for a 12v system and a float of 13.5 volts. Trojan T105 are great batteries and with care will last 4 to 5 years if looked after.Ĭharging to the correct absorption voltage is important with these batteries, you need a charger that's temperature compensated. The best method to determine the state of the batteries is to measure the SG. With any monitor accumulated errors can build and may need reset from time to time. Alternative monitors like the Victron BMV712 or Smart Shunt allow these variables to be set up and will record a more accurate SOC. What this means is that the higher the current you draw out of the battery the lower the effective battery capacity. Peukerts constant is a battery capacity correction factor. With lead acid batteries of the type you have, you need to put more energy in than you get out, perhaps 10% to 20% more. Its not possible to set up these in the Renogy unit. It will report current and voltage correctly but the readings for battery capacity, or state of charge, will have errors due to the charge efficiency factor and Peukerts constant. Thanks muchĬlick to expand.The Renogy battery monitor is not the best for lead acid. All that to say, should I have gone about my setup in a different manner? Is there a resource that can guide me in knowing that my system is set up optimally as the battery monitor readings are somewhat of a foreign language at the moment? I wish I had found this group before purchasing the flooded cells and I would have gone lithium but we will use the flooded cells until they die then move to lithium. ![]() Though we have only had the new setup running a week or so, it seems to be meeting our needs nicely. Our power needs are very basic but as we are on a treed lot, I felt the need to go with extra batteries and panels as our sun exposure is somewhat limited. I have followed my initial setup plan and tried to keep things simple by attaching the Trojans to the RVs 12 volt system and attached the converter to the battery bank to power only the modem and TV. The system is as follows 3x150watt panels, m2430 30 amp controller, 4圆v Trojan T125 flooded cells in series/parallel, Renogy 1000watt pure sine converter and a Renogy Battery Monitor. Since upgrading to the bigger Cedar Creek this year, we have added internet access and a TV therefore I have upgraded the solar system. ![]() For the past few years, I have had a very basic setup in an older trailer to run lights and propane fridge. ![]() We have a 35 foot Cedar Creek RV that is stationary and off-grid at our lake lot. First of all, my disclaimer: I am a total solar newbie and depend on YouTube and groups like this for my information.
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